Boring and mortising machine



UNITED STATES PATENT OFFICE.

COLLIN G. POLLOCK, OF CINCINNATI, OHIO.

BORING AND MORTISING MACHINE.

Specification of Letters Patent No. 25,523, dated September 20, 1859.

To all whom it may concern:

Be it known that I, C. Cr. PoLLooK, of Cincinnati, in the county of Hamilton and State of Ohio, have invented a new and Improved Boring and Mortising Machine; and I do hereby declare that the following is a full, clear, and eXact description of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure l, is a side elevation of my invention. Fig. 2, is a plan or top view of ditto. Fig. 3, is a detached View of the chisel. Fig. 4, is a detached sectional view of the connection which secures the lever to the chisel arbor.

Similar letters of reference indicate corresponding parts in the several gures.

This invention consists in a peculiar arrangement and combination of parts substantially as hereinafter shown and described, whereby a very portable, simple and eflicient machine is obtained for boring and mortising.

The object of the invention is to perform the Work both of boring and mortising with a single shaft or arbor so arranged with certain necessary parts as to be capable of operating up and down in a vertical direction as the arbor of an ordinary mortising machine, and also capable of being secured and prevented from moving in said direction and have a rotary motion imparted to it when used for boring.

To enable those skilled in the art tofully understand and construct my invention I will proceed to describe it.

A, represents an upright which has a suitable bar B, to support it, the base being secured to the flooring by screws or bolts.

C, is a collar which is fitted loosely on the upright and allowed to slide freely up and down thereon, the collar being secured at any desired point by a set screw a, as shown clearly in Fig. l. To the collar C, a horizontal plate D, is secured or cast with it. This plate has a longitudinal dove-tail, recess or groove in its upper surface to receive a bed E, which is allowed to move freely in the plate D. This bed his a rack o, attached to its under side into which rack a pinion c, gears, said pinion being on a shaft F, the bearings of which are at the under side of the plate D, see Fig. 1.

The upright A, has two horizontal arms (Z, 6l, projecting from it, one being over the other in the same plane and having each a guide e, at its outer end through which a vertical arbor F, passes said arbor being allowed to slide freely up and down in the guides. Cn the upper part of the arbor F,

'a bevel toothed wheel G, is placed loosely and secured thereto so as to rotate the arbor by means of a feather f, which fits in a vertical groove g, in the arbor, as shown clearly in Fig. 1. Into the wheel G, a corresponding wheel H, gears the latter wheel being on a horizontal shaft I, which is fitted in a bearing J, attached to the upright A.

K, represents a lever, the fulcrum pin hi, of which passes through the upright A. To the back end of the lever an elastic strap or a spring L, is attached, said spring being also attached to the upright A, and having a tendency to keep the front end of the lever and arbor F, elevated. The lever K, is attached to the arbor F, by a knuckle joint connection M, see Figs. 1 and 4f. This connection is formed of a socket z', composed of two equal and vertical parts which embrace the arbor in a recess j, See Fig. 4. The lever K, is connected to the socket z', by pins lo, k, which pass into horizontal slots Z, one in each part of the socket. By means of this connection a vertical movement is given the arbor F, by actuating lever K.

Cn the arbor F, a ring or collar m, is fitted and secured at any desired point by a set screw n. This ring or collar by being adjusted at dierent points on the arbor determines the length of the stroke of the arbor F, when the latter has a vertical reciprocating movement given it. On the arbor F, there is also placed a bar o, the ends of which are notched or grooved vertically to receive a vertical guide projection p, on the upright A. This bar 0, has a set screw g, passing through it by which the bar may be firmly secured to the arbor.

N, is a chisel provided with lips r, o", one at each side of its cutter edge. The inner surfaces of these lips as well as the back surface of the chisel are bearded as shown clearly in Fig. 3. The chisel when the machine is used for mortising is inserted in the lower end of the arbor F, and when the machine is used for boring the chisel N, is withdrawn and the auger O, shown in Fig. 1, inserted in its stead.

The operation is as follows: The stuffl P,

to be operated on, shown in red, is secured on the bed E, by screws s. If in mortising,

this piece of stuff it requires to be previously bored the auger O, is inserted in the arbor F, the bar o, if secured to the arbor by the set screw g, is loosened and detached from the arbor. rlhe stuit P, is then adjusted in proper position under the auger O, and motion given the shaft F, by any convenient power, the arbor F, being rotated from shaft F, by means of the gearing G, H. The auger O, is fed down to its work by depressing the lever K, and the length of the downward movement of the auger is determined by adjusting the collar my, which serves as a stop. When mortising is to be done, the auger O, is removed and the chisel N, inserted in its place. The bar o, is then secured to the arbor F, by the set screw g, a notch in one end of the bar being fitted over on the projection p. The lever K, is then operated or moved up and down, the bar 0, serving as a guide to the arbor and at the same time preventing it from casually rotating. The chisel N, cuts the mortise inthe usual way, the beards of the chisel withdrawing the chips as the chisel moves upward, the knuckle joint connection M, permitting the arbor F, to rise and fall vertically under the curvilinear movement of the lever K. The height of the stu P, may be regulated as occasion may require by adjusting the collar C, on the upright A.

It will be seen from the above description that the machine may be used for both boring and mortising, and this result is obtained by a very simple arrangement of means.

I do not claim separately any of the within describedparts; but,

I do claim as new and desire to secure by Letters Patent,

The arrangement and combinationof the bar 0, on the arbor F, projection p, on the upright A, lever K, connected with the arbor F, by the knuckle joint M, and the bevel gear Gr, H, for joint operation substantially as set forth.

COLLIN Gr. POLLOCK. Witnesses:

JACOB H. GETZENDANNER, WM. WHITE. 

